But the tech magnates on the list are probaby less sanguine. Mark Zuckerberg, after Facebook’s less-than-inspiring IPO, lost the most money of the bunch. He still has $9.4 billion, but the company’s public debut cost him $8.1 billion in net worth and sent him down to 36th place from 14th, just behind Rupert Murdoch.

Facebook co-founder Dustin Moskovitz is, at age 28, the youngest billionaire in the country with $2.7 billion. Zuckerberg, eight days older, is second youngest.

Overall, however, members of the fat-cat club fared quite nicely. Only 66 of the 400 saw their net worth shrink; 241 enjoyed an increase as the real estate market began recovering and stock prices swung up.